On Sunday night, “Fox Sports Live” reported Pettis will in fact have to withdraw from the scrap. Now that UFC on FOX 9 is without a main event, the flyweight title tilt between champ Demetrious Johnson and Joseph Benavidez, which was originally scheduled to headline “The Ultimate Fighter 18 Finale,” will now take top billing in Pettis and Thomson’s place.

The lightweight shootout with Gray Maynard and Nate Diaz, which was initially slated to co-headline TUF 18 Finale, now gets bumped to the show’s featured attraction.